Patent · US Expired

Spark plug

US6583538B1 · kind B1 · utility

3Cited by

8References

9Claims

0Family size

Assignee

BERU Aktiengesellschaft · DE

Inventors

Manfred Adolf · Schwaikheim, DE
Werner Niessner · Steinheim, DE

Key dates

Filing date	Oct 18, 2000
Grant date	Jun 24, 2003
Priority date	—
Expiry date	May 11, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH01T13/39
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Spark plug with an electrically insulating ceramic insulator (1), a metallic spark plug body (2), a ground electrode (3) and a middle electrode (4) which is located centrally in a hole (5) of the ceramic insulator (1), around the ignition-side end area on the periphery of the middle electrode (4) a peripheral tip (10) being formed which encompasses the middle electrode (4) in an annular manner.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.